The combination of a very slow moving cold front and copious moisture from the remnants of Tropical Storm Tammy produced periods of very heavy rain across Philadelphia from the late evening of the 7th into the early evening of the 8th. The last period of very heavy rain caused many of the creeks in the city to flood. Flooding was reported along the Wissahickon, Frankford, Cobbs and Pennypack Creeks. Flooding also occurred along the Schuylkill River. Storm totals averaged five to six inches. The heavy rain caused widespread urban and poor drainage flooding. Flooding along the Schuylkill River occurred in the city's East Falls section and caused the evacuation of one elderly resident. It also caused the closure of both Kelly Drive and River Road. The Schuylkill River in Philadelphia was above its 11 foot flood stage from 1048 p.m. EDT on the 8th through 1224 p.m. EDT on the 9th. It crested at 12.07 feet at 630 a.m. EDT on the 9th. The Frankford Creek at Castor Avenue was above its 7 foot flood stage from 631 p.m. EDT through 1020 p.m. EDT on the 8th. It crested at 10.37 feet at 7 p.m. EDT. The Pennypack Creek at the Rhawn Street Bridge was above its 7 foot flood stage from 737 p.m. EDT on the 8th through 618 a.m. EDT on the 9th. It crested at 9.80 feet at 415 a.m. EDT on the 9th. The Wissahickon Creek at its mouth was above its 5 foot flood stage from 907 p.m. EDT on the 8th through 618 a.m. EDT on the 9th. It crested at 5.66 feet at 4 a.m. EDT on the 9th.Storm totals included 6.15 inches in Roxborough, 6.12 inches at Philadelphia International Airport, 5.10 inches at the Franklin Institute, 5.00 inches at the Northeast Philadelphia Airport and 4.28 inches at the Fairmont Dam. This heavy rain helped the state of Pennsylvania have its second wettest October on record dating back to 1895. The statewide average precipitation total was 6.49 inches, 3.31 inches wetter than normal. Only 1976 (6.59 inches) was wetter. October 2005 was the wettest October on record at the Philadelphia International Airport with a precipitation total of 8.68 inches, 5.93 inches wetter than normal and surpassed the previous record by 2.02 inches.  The cold front moved from near Pittsburgh, Pennsylvania at 8 p.m. EDT on the 7th, to the Susquehanna Valley in Pennsylvania at 2 a.m. EDT on the 8th, to the Poconos and Berks County in Pennsylvania and just west of Chesapeake Bay in Maryland at 8 a.m. EDT on the 8th. The cold front stalled as waves of low pressure road northeast along it. At 2 p.m. EDT on the 8th, the cold front just edged into northwestern New Jersey and the Philadelphia northwest suburbs and was still west of Chesapeake Bay in Maryland. At 8 p.m. EDT that evening the cold front barely moved into the Philadelphia New Jersey suburbs and the Delmarva Peninsula. The cold front and waves of low pressure cleared the Delaware and New Jersey coasts between Midnight EDT and 2 a.m. EDT on the 9th. The slow movement and stalling coupled with an unstable air mass and tropical moisture associated with Tammy helped enhance the torrential downpours. The flooding would have been even worse if not for the unseasonably dry weather that preceded this event from the middle of August.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 08-OCT-05 17:31:00 to 08-OCT-05 21:00:00 (EST)
Location: COUNTYWIDE
Reported by: AWOS,ASOS,MESONET,ETC

Flood in PHILADELPHIA, PENNSYLVANIA
From 08-OCT-05 21:00:00 to 09-OCT-05 11:24:00 (EST)
Reported by: AWOS,ASOS,MESONET,ETC